A rain and water detection sensor module with a rain-sensing pad and a control board. Outputs both analog (moisture level) and digital (rain/no rain) signals. Used in weather stations and automatic window control.
| Pin | Name | Function | Type |
|---|---|---|---|
| VCC | VCC | 3.3V–5V power | PWR |
| GND | GND | Ground | GND |
| AO | AO | Analog output, lower = more rain | ADC |
| DO | DO | Digital output, LOW = rain detected | I/O |